WO2022012463A1 - Core wire transmission device for safety belt retractor and safety belt retractor - Google Patents

Abstract

A core wire transmission device for a safety belt retractor, the device comprising: a core wire (28) having a first end section (28-1) and a second end section (28-2), wherein the first end section (28-1) is provided with an actuating element, and the second end section (28-2) is in transmission connection with a vehicle sensing device (10); a first pulley which comprises a core wire mounting portion (58) which is provided with a core wire channel (58-1) for containing and guiding the first end section (28-1) of the core wire (28) and a bolt hole (58-2) arranged alongside the core wire channel, wherein the core wire (28) can be wound and unwound on the first pulley; and an adjusting bolt (32) received in the bolt hole (58-2), wherein the screwing of the adjusting bolt in the bolt hole (58-2) can drive the actuating element in the first end section (28-1) in the direction deviating from the core wire (28), thereby driving the core wire (28) to move relative to the first pulley. Further disclosed are a safety belt retractor and a method for calibrating the vehicle sensing device of the safety belt retractor. The core wire transmission device uses fewer parts and achieves a compact structural arrangement, such that the stress manner of the adjusting bolt is better, the risk of abrading the tail ends of threads is reduced, and the fastening force of the bolt is relatively stable.

Description

Wire drives and seat belt retractors for seat belt retractors technical field

The present disclosure generally relates to the technical field of vehicle safety, and more particularly, the present disclosure relates to a core wire transmission device and a seat belt retractor for a seat belt retractor.

Background technique

In the field of vehicle safety technology, a vehicle seat belt may be a safety protection device for protecting an occupant when the vehicle encounters an emergency situation such as emergency braking, collision or overturn, wherein the occupant can be restrained by a belt-shaped webbing, and the webbing can pass the safety The mandrel with retractor is retracted and can be secured to the vehicle by means of a locking tongue. Vehicle seat belts can be an important part of a vehicle's passive safety system. The vehicle may be, for example, a passenger car, a van or other means of transport.

With the development of vehicle technology, users have higher and higher requirements for vehicle comfort, and the same is true for the comfort of vehicle seats. In the development of vehicle seats, the inclination angle of the seat back has evolved from fixed to adjustable, and the adjustable angle has become larger and larger. In some commercial vehicles, the adjustment angle of the seat back close to flat has even been achieved.

Some known seat belt retractors are equipped with a vehicle sensing device, which can be used as a mechanical sensor in the seat belt retractor to sense vehicle status, such as the acceleration and inclination angle of the vehicle. In this state, the vehicle sensing device can sense the emergency state, and can prompt the mandrel of the seat belt retractor to lock, preventing the webbing from continuing to be drawn out of the mandrel, so that the occupant can be well restrained by the webbing and thus obtain good safety protection. Typically, earlier vehicle feeling devices are fixedly mounted on the vehicle body or vehicle seat, which may not meet the technical requirements of seat back adjustment.

In addition, adaptive car-sensing devices are known, which can be adjusted together with the seat back by their own weight. Since the adaptive car-sensing device is active, its adaptive angle adjustment range is limited, and there is still room for improvement in the car-sensing sensitivity. Therefore, a car-sensing device with a large angle adjustable and a sensitive and reliable car-feeling function is expected.

The wire-controlled seat belt system integrated in the vehicle seat provides a better technical solution for the large-angle adjustment of the seat back. The wire-controlled seat belt system may include a vehicle sensing device, a steering wheel assembly and a core wire assembly. Wherein, the vehicle feeling device may be arranged in the seat back, and the reclining plate assembly may be installed between the seat back and the seat, and may be linked with the seat recliner. The vehicle-feeling device and the steering wheel assembly are connected by a core wire assembly. When the seat back is rotated, the angle adjustment disc assembly winds up or unwinds the core wire to drive the car feel device, so that the car feel device and the seat back can adjust the angle synchronously and keep the angular position relative to the ground basically unchanged .

Since the position of the vehicle sensing device during the synchronous adjustment of the angle of the seat back is related to whether the acceleration of the vehicle can be sensed correctly, thereby protecting the safety of the occupants, it is important to keep the vehicle sensing device in the correct angular position all the time. Since the core wire is mainly used for transmission between the vehicle feeling device and the cam plate assembly, and the length of the core wire is long (for example, it can be about 1m), and the number of parts associated with the core wire transmission is large, the vehicle sensing device , The accumulative tolerance of the angle adjustment disc assembly, core wire assembly and related parts after direct assembly is large, which may cause the actual angular position of the car sensor device to deviate from the design angle position, thereby affecting the car sensor function of the car sensor device. .

In order to solve the above problems, the angular position of the vehicle sensing device can be adjusted and calibrated, so as to basically ensure that the vehicle sensing device is always kept in the correct angular position in the subsequent work.

In some existing wire-controlled reclining disc assemblies, a drawing-type core wire adjustment scheme is adopted, for example, a bolt and a slider are used in combination, wherein the end of the core wire is fixed on the slider, and the slider is placed on the slider by the adjustment angle. Inside the rack driven by the disc assembly, one end of the bolt passes through the rack and the other end is connected to the slider. The slider is pulled by screwing the bolt, thereby driving the core wire to adjust the car feel device. This solution has a large number of parts, a complex structure, a large volume of the device, and the tightening force of the core wire is not stable, but changes with the length of the bolt screwed into the slider.

SUMMARY OF THE INVENTION

One of the objectives of the present disclosure is to provide a core wire transmission device for a seat belt retractor and a seat belt retractor, which can optimize the structure of parts and reduce the tightening of the core wire while ensuring the accuracy of the angular position of the vehicle sense. The volume of the device improves the applicability of the product.

Additional features and advantages of the subject technology of the present disclosure will be set forth in the description that follows, and in part will be apparent from the description, or may be learned by practice of the subject technology of the present disclosure. The advantages of the subject technology of the present disclosure will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

One aspect of the present disclosure relates to a core wire transmission device for a seat belt retractor, the core wire transmission device comprising:

a core wire having a first end section and a second end section, the first end section having an actuating element, the second end section being configured for reeling with a seat belt The drive connection of the rotatable car-sensing device of the receiver;

A first pulley comprising a core wire mounting portion having a core wire channel for receiving and guiding a first end section of the core wire and a core wire channel arranged side by side with the core wire channel a bolt hole, the core wire can be wound and unwound on the first pulley, the core wire transmission device includes an adjustment bolt received in the bolt hole, the screwing of the adjustment bolt in the bolt hole can be In the first end section, the actuating element is driven in a direction facing away from the core wire and thus drives the core wire in a movement relative to the first pulley.

The bolt holes of the core wire transmission device for the seat belt retractor according to the embodiment of the present invention can be directly arranged on the first pulley without additionally providing a slider or other threaded fit as is known in the prior art parts, so that a smaller number of parts and a compact structure can be achieved. By pushing the adjustment bolt completely through the bolt hole and then pushing the core wire, the adjustment of the core wire and thus the vehicle-feeling device can be realized, which can realize the better stress of the adjustment bolt. This reduces the risk of galling at the end of the thread compared to adjusting the bolt to pull the threaded fitting. In addition, since the length of the threaded fitting portion of the adjusting bolt can be constant, the tightening force of the bolt can be relatively stable.

In some embodiments, the core wire mounting portion may be configured as a boss on the edge of the first pulley.

In some embodiments, the core wire channel may extend in the circumferential or tangential direction of the first pulley, and the bolt holes may extend in the tangential direction of the first pulley.

In some embodiments, the bolt holes may be radially outside of the core wire channel.

In some embodiments, the bolt holes may be axially flanked by the core wire channel.

In some embodiments, the manipulation element may be configured as a first tip at the end of the first end section of the core wire, which may at least partially cover the bolt hole.

In some embodiments, the core wire mounting portion may have an elongated mounting seat corresponding to the outer contour shape of the first end of the core wire to accommodate and guide the first end.

In some embodiments, the first end of the core wire may have a figure-8, circular, rectangular or oval outer contour.

In some embodiments, the second end section may be drivingly connected to the vehicle sensing device via a transmission mechanism.

In some embodiments, the second end section may be drive-connected to the vehicle feel device via a second pulley, wherein the second end of the second end section may be fixed in the second pulley.

In some embodiments, the second end section can be wound and unwound on a second pulley, which can be drivingly connected to the feel device.

In some embodiments, the second pulley may have a push rod, which may be configured to directly drive the vehicle feel device.

In some embodiments, the core wire drive may include a return spring configured to tension the core wire in a direction away from the first pulley.

In some embodiments, the core wire drive may further include a calibration indicating structure.

In some embodiments, the alignment indicator structure may include a first alignment indicator marker associated with core wire movement and a stationary second alignment indicator marker, the first alignment indicator marker and the second alignment indicator marker being configured to When the first calibration indicator and the second calibration indicator are aligned with each other, the adjustment bolt is adjusted to the target position and the vehicle sensing device reaches the calibrated angular position.

In some embodiments, the second end section may be drivingly connected to the vehicle sensing device via a transmission mechanism, the transmission mechanism or the vehicle sensing device having a first calibration indicator.

In some embodiments, the first calibration indicator mark may be configured as a first calibration indicator hole.

In some embodiments, the transmission can include a transmission housing that can have a second calibration indicator.

In some embodiments, the second calibration indicator mark may be configured as a second calibration indicator hole.

In some embodiments, the first pulley may be an angle adjustment disk of an angle adjustment disk assembly, and the angle adjustment disk assembly may further include an angle adjustment housing, and the angle adjustment housing may have a core wire introduction portion.

In some embodiments, the reclining housing may be configured to be fixedly connected coaxially with a pivot axis of the backrest of the vehicle seat.

In some embodiments, the core wire can be wound on the cam disc when the cam housing is rotated relative to the cam disc in a first rotational direction, wherein the first rotational direction corresponds to the backrest being backward Tilt adjustment direction.

In some embodiments, the angle adjustment disc may have a long diameter portion with a longer turning radius and a short diameter portion with a short turning radius, and the short diameter portion may have a core wire winding portion.

In some embodiments, the angle adjustment housing may have a long diameter portion with a longer turning radius and a short diameter portion with a short turning radius, and the short diameter portion of the housing and the long diameter portion of the angle adjustment plate Can work together to limit the rotation angle range of the housing relative to the angle adjustment plate.

In some embodiments, the core wire introduction portion may be configured such that the core wire is introduced into the cam plate assembly in a direction tangential to the core wire winding portion.

In some embodiments, the core wire lead-in portion may be provided in the area of the short diameter portion of the angle adjustment housing.

In some embodiments, the cam plate assembly may include a wrench configured for non-rotatable mounting relative to the seat of the vehicle seat.

In some embodiments, the wrench may be configured to be fixedly attached to the cam disc, or may be configured to prevent the cam disc from continuing to rotate toward the first rotational direction at an angular position.

Another aspect of the present disclosure relates to a seatbelt retractor including a retractor body configured for mounting to a backrest of a vehicle seat, a rotatable integrated in the retractor body The car feel device and the core wire transmission device described above.

Another aspect of the present disclosure relates to a method for calibrating a vehicle feel device for a seat belt retractor including a retractor body configured for mounting to a backrest of a vehicle seat, an integrated The rotatable vehicle feel device in the retractor body and the core wire transmission device according to the above, the method comprises the following method steps:

Inserting the first end section of the core wire into the core wire channel, and drivingly connecting the second end section of the core wire with the vehicle sensing device;

The adjustment bolt is screwed into the bolt hole to actuate the actuating element and thus the core wire until the first alignment indicator and the second alignment indicator are aligned with each other.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the technology of the claimed subject matter of the present disclosure.

Description of drawings

Aspects of the present disclosure will be better understood after reading the following detailed description in conjunction with the accompanying drawings, in which:

FIG. 1 shows a schematic side view of a vehicle seat with a seat belt retractor.

FIG. 2 shows a schematic view of the seat belt retractor of FIG. 1 .

FIG. 3 shows an exploded view of the seat belt retractor of FIG. 2 .

4 shows an exploded view of a cam plate assembly with a core wire drive according to one embodiment of the present disclosure.

5A shows a cross-sectional view of a core wire transmission device according to one embodiment of the present disclosure.

Figure 5B shows an enlarged view of the circled portion of Figure 5A with the adjustment bolt in a position ready to push the core wire.

Figure 5C shows an enlarged view of the circled portion of Figure 5A with the adjustment bolt in a position where the core wire has been pushed.

6 shows a front view and a perspective view of a cam plate according to one embodiment of the present disclosure.

7 shows a cross-sectional view of a core wire mounting portion according to an embodiment of the present disclosure.

8A shows a perspective view of the first end of the core wire according to one embodiment of the present disclosure.

8B shows a perspective view of the first end of the core wire according to another embodiment of the present disclosure.

8C shows a perspective view of the first end of the core wire according to another embodiment of the present disclosure.

9 shows a cross-sectional view of a transmission mechanism according to one embodiment of the present disclosure.

detailed description

The present disclosure will be described below with reference to the accompanying drawings, which illustrate several embodiments of the disclosure. It should be understood, however, that this disclosure may be presented in many different forms and is not limited to the embodiments described below; Those skilled in the art will fully explain the protection scope of the present disclosure. It should also be understood that the embodiments disclosed herein can be combined in various ways to provide still further embodiments.

It should be understood that the same reference numerals refer to the same elements throughout the drawings. In the drawings, the dimensions of certain features may be varied for clarity.

It should be understood that the phraseology in the specification is used to describe particular embodiments only and is not intended to limit the present disclosure. All terms (including technical and scientific terms) used in the specification have the meanings commonly understood by those skilled in the art unless otherwise defined. Well-known functions or constructions may not be described in detail for brevity and/or clarity.

As used in this specification, the singular forms "a", "the" and "the" include the plural forms unless clearly indicated otherwise. The terms "comprising", "including" and "containing" are used in the specification to indicate the presence of a claimed feature, but not to exclude the presence of one or more other features. As used in this specification, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In the specification, when an element is referred to as being "on", "attached" to, "connected" to, "coupled" to, or "contacting" another element, etc. The element may be directly on, attached to, connected to, coupled to, or in contact with another element, or intervening elements may be present. In contrast, an element is referred to as being "directly on" another element, "directly attached" to another element, "directly connected" to another element, "directly coupled" to another element or, or "directly coupled" to another element. When directly contacting" another element, there will be no intervening elements. In the specification, a feature is arranged "adjacent" to another feature, which can mean that one feature has a portion that overlaps an adjacent feature or a portion that is above or below an adjacent feature.

In the specification, spatially relative terms such as "up," "down," "left," "right," "front," "rear," "high," "low," etc. may describe one feature versus another relationship in the attached drawing. It should be understood that spatially relative terms encompass different orientations of the device in use or operation in addition to the orientation shown in the figures. For example, when the device in the figures is turned over, features previously described as "below" other features may now be described as "above" the other features. The device may also be otherwise oriented (rotated 90 degrees or at other orientations) in which case the relative spatial relationships will be interpreted accordingly.

Figure 1 schematically shows a side view of a vehicle seat with a seat belt retractor. FIG. 2 is an enlarged schematic view of the seat belt retractor of FIG. 1 with the vehicle seat hidden. The vehicle can be, for example, a passenger car or a truck, in particular a partially or fully autonomous motor vehicle. The vehicle seat has a seat portion 5 and a backrest 4 which can be reclined forwards and backwards from a predetermined substantially upright initial position depicted in solid lines in FIG. 1 . The initial position may be optimized for occupant seating and maneuvering of the vehicle. The backrest 4 can be laid forward on the seat 5 in order to make room. The backrest 4 can be adjusted rearwardly to a near-horizontal maximum inclination position where the occupant can rest. The maximum inclination position may correspond to an inclination angle of approximately 180°, for example, an inclination angle of approximately 170°, with reference to the heading direction of the vehicle. The backrest 4 can be adjusted to any intermediate position between the predetermined initial position and the maximum inclination angle position according to the needs of the user, for example, it can be adjusted to an inclination angle of about 120° or 135°. The two end positions of the backrest 4 are depicted by dashed lines in FIG. 1 .

The retractor body 1 is fixedly mounted in the backrest 4 . The retractor body 1 has an integrated rotatable feel device 10 (see FIGS. 2 and 3 ). On the pivot shaft of the backrest 4, a reclining disc assembly 3 can be coaxially installed, and the reclining disc assembly is coupled with the vehicle sensing device 10 via the core wire assembly 2, so as to adjust the angle of the vehicle sensing device. In the predetermined initial position of the backrest 4 , the sensor device 10 is in a substantially vertical orientation. In the case where the vehicle sensing device is fixed relative to the backrest, when the backrest is adjusted backwards by a certain angle from the initial position, the vehicle sensing device accordingly deviates from the vertical orientation by this angle. In the case of an adaptive car-sensing device, when the backrest is adjusted backwards by a certain angle from its initial position, the car-sensing device is adaptively rotated by its own gravity and remains in a vertical orientation, whereas an active car-sensing device is sensitive in terms of sensitivity There is room for improvement, and the angular range of adaptive adjustment typically does not exceed 45°. In the seat belt retractor according to the invention, when the backrest 4 is adjusted rearwards by a certain angle from the initial position, on the one hand, the vehicle sensor device 10 is accordingly deviated from the vertical orientation by this angle, and on the other hand, at the same time, the angle adjustment disk is caused. The pulling of the core wire assembly 2 by the assembly 3 and finally the rotation of the vehicle feel device 10 in the opposite direction by another angle which can at least partially compensate the aforementioned angle, especially preferably substantially completely compensate the aforementioned angle And so that the vehicle sensing device 10 can remain substantially in a vertical orientation. Since the mobility of the vehicle feeling device 10 is constrained by the cam plate assembly 3 and the core wire assembly 2, the vehicle feeling sensitivity can even be compared with that of a fixedly installed vehicle feeling device. At the same time, the car-sensing device can be compared with the adaptive car-sensing device in terms of positioning angle. In other words, the vehicle-sensing device according to the invention can combine the advantages of a fixed-mounted vehicle-sensing device with the advantages of an adaptive vehicle-sensing device.

As shown in FIGS. 2 and 3 , the retractor body 1 may include a frame 17 . Typically, the frame 17 may be constructed as a U-shaped frame. A mandrel 26 for winding the webbing is rotatably supported in the frame 17 . A coil spring for preloading the mandrel 26 in the winding direction and a coil spring side cover covering the coil spring can be provided on one axial end, which coil spring side cover can be fastened to the frame 17 . The coil spring and the coil spring side cover may constitute a coil spring assembly 22 . At the other axial end, the mandrel 26 can drive the ratchet wheel 21 . Here, the retractor body 1 may have a mechanical inner cover 18 and a mechanical outer cover 23 . The ratchet 21 may be received in the inner mechanical cover 18, and the feel device 10 may be installed in the inner mechanical cover. The inner mechanical cover 18 can in turn be received in the outer mechanical cover 23 . The mechanical inner cover 18 and the mechanical outer cover 23 may be fixed to the frame 17 together. In the event of an emergency situation of the vehicle, such as a collision or rollover, the vehicle sensing device 10 can lock the ratchet wheel 21 , thereby causing the locking pawl guided by the ratchet wheel to engage in the ring gear of the frame 17 as can be seen in FIG. 3 , so that the core The shaft 26 is locked. Regarding the vehicle sensing device 10 and the locking device, for example, the applicant's patent application CN110027502A can be referred to. The vehicle feel device 10 may include a rotatably supported sensitive seat 14, which may have a concave bowl surface. The sensitive ball 25 can move in the sensitive seat. At rest, the sensitive ball is at the bottom of the bowl surface. In the event of an emergency in the vehicle, the sensitive ball 25 leaves the bottom of the bowl surface under the action of inertial force, and lifts the sensitive pawl 15, which in turn lifts the locking pawl 8, so that the locking pawl 8 engages with the ratchet 21, thereby causing the spindle 26 lock.

In order to improve the sensitivity of the vehicle sensing device, it is desirable to adjust and calibrate the angular position of the vehicle sensing device, so that the vehicle sensing device can be kept at the designed angular position as much as possible.

The core wire transmission device for the seat belt retractor according to one embodiment of the present disclosure, which is configured to be able to adjust the angular position of the vehicle sensing device 10, will be described in further detail below with reference to FIGS. 3 to 8C . As shown in FIGS. 4 to 5C , the core wire transmission device for the seat belt retractor according to one embodiment of the present disclosure may include the reclining disc 31 in the reclining disc assembly 3 , the core wire in the core wire assembly 2 28 and adjusting bolt 32. The first end section 28 - 1 of the core wire 28 is mounted to the cam disc 31 and can be drivingly connected to the vehicle feel device 10 through the second end section 28 - 2 , so that the core wire 28 is in the cam disc 13 . Winding and unwinding on the vehicle feel device 10 can be manipulated. In some embodiments, the core wire drive may be connected to the vehicle sense device 10 by a transmission mechanism, such as to the sensitive seat 14 of the vehicle sense device 10, and the second end section 28-2 of the core wire 28 is mounted to the vehicle sense device 10. transmission mechanism. In a not-shown embodiment, the end 30 of the core wire 28 may be directly connected to the vehicle sensing device 10 .

As shown in FIGS. 4 , 5A to 5C and FIG. 6 , the first end section 28 - 1 of the core wire 28 may be mounted in the core wire mounting portion 58 on the cam plate 31 . The core wire mounting portion 58 may be configured with a core wire channel 58-1 for receiving and guiding the first end section 28-1 of the core wire 28 and a bolt hole 58-2 arranged side by side with the core wire channel 58-1 , the bolt hole is used to receive the adjusting bolt 32 . The core wire mounting portion 58 may be a boss provided at the edge of the angle adjustment disk 31, wherein the core wire channel 58-1 may extend in the circumferential or tangential direction of the angle adjustment disk 31, and the bolt holes 58-2 may be adjusted in the adjustment direction. The tangent of the corner disc 31 extends upward. The bolt hole 58-2 may be located radially outside the core wire channel 58-1. The end of the first end section 28-1 of the core wire 28 may be provided with a first end 29, the cross-section of which may at least partially cover the bolt hole 58-2, so that the adjustment bolt 32 is in the bolt hole 58-2. The screwing in the hole 58-2 drives the first end piece 29 at the first end section 28-1 in a direction away from the core wire 28 and thus drives the movement of the core wire 28 relative to the cam disc 31 . It should be understood that in other embodiments, other forms of manipulating elements may be provided in place of the first tip 29 to achieve the same purpose. The core wire 28 is driven to move by screwing in the adjusting bolt 32 , the core wire 28 can further drive the rotation of the vehicle sensing device 10 connected to it, so that the angular position of the vehicle sensing device 10 can be adjusted and calibrated.

As shown in FIGS. 7 and 8A , in one embodiment, the first end 29 of the core wire 28 may have an “8”-shaped outer contour, and the core wire mounting portion 58 of the angle adjustment disk 31 may have a correspondingly shaped outer contour The elongated mount 60 to receive and guide the first end 29 of the core wire 28.

As shown in FIG. 8B, in yet another embodiment, the first end 29-1 of the core wire 28 may be rounded. As shown in FIG. 8C, in yet another embodiment, the first end 29-2 of the core wire 28 may be rectangular. The outer contour of the first end of the core wire 28 may also be in other suitable shapes (eg, oval, oval, etc.). Advantageously, the first end can at least partially cover the bolt hole 58 - 2 and enable the adjustment bolt 32 extending through the bolt hole 58 - 2 to drive the first end, while at the first end of the core wire 28 . The end section 28 - 1 drives the first end and thus the core wire 28 in a direction away from the core wire 28 . The core wire mounting portion 58 may have an elongated mounting seat corresponding to the outer contour shape of the first tip.

As shown in FIG. 4 , the angle adjustment plate assembly 3 may further include an angle adjustment housing, and the angle adjustment housing includes an angle adjustment housing 13 and a housing cover 11 . The angle housing 13 has a core wire lead-in 46 and is configured to be fixedly connected coaxially with the pivot axis of the backrest of the vehicle seat. When the angle adjustment housing 13 rotates relative to the angle adjustment disk 31 in the first rotation direction D1, the core wire 28 can be wound on the angle adjustment disk 31, wherein the first rotation direction D1 corresponds to the backrest backward Tilt adjustment direction. The cam wheel assembly 3 may further include a wrench 12 configured to be mounted without relative rotation relative to the seat portion of the vehicle seat. The wrench 12 may be configured to be fixedly connected with the angle adjustment disc 31, or may be configured to prevent the angle adjustment disc 31 from continuing to rotate toward the first rotation direction D1 at a certain angular position, so that the angle adjustment housing 13 is rotated along the The rotation in the first rotation direction D1 can wind the core wire 28 on the cam plate 31 .

As shown in FIG. 4 , the angle adjustment plate 31 may have a long diameter portion 51 with a longer turning radius and a short diameter portion 52 with a short turning radius, and the short diameter portion 52 may have a core wire winding portion 59 thereon. The angle-adjusting housing 13 may have a long-diameter portion 41 with a longer rotational radius and a short-diameter portion 42 with a short rotational radius. The short-diameter portion 42 of the angle-adjusting housing 13 and the long-diameter portion 51 of the angle-adjusting plate 31 work together to limit the rotation angle range of the angle-adjusting housing 13 relative to the angle-adjusting plate 31 . In some embodiments, the core wire introduction portion 46 is configured such that the core wire 28 can be introduced into the cam wheel assembly 3 in a direction tangential to the core wire winding portion 59 . In some embodiments, the core wire lead-in portion 46 is provided in the area of the short diameter portion 42 of the angle adjustment housing 13 .

As mentioned above, the core wire transmission may be connected to the vehicle feel device 10 by a transmission mechanism, and the second end section 28-2 of the core wire 28 is mounted to the transmission mechanism. As shown in Figures 2, 3 and 9, in one embodiment, the second end section 28-2 of the core wire 28 may mate with the transmission case assembly 9 as a transmission mechanism. The gearbox assembly 9 may be installed in the mechanical cover 23 . The transmission case assembly 9 may include a transmission housing, which may include two housing parts 16 , 20 . The drive pulley 19 is rotatably supported in the drive housing, and more specifically, may be supported on the central column of the first housing part 20 . The second end section 28 - 2 of the core wire 28 can have a second end 30 which can be fastened to the drive pulley 19 and can be wound and unwound on the periphery of the drive pulley 19 . For example, the drive pulley 19 can have a push rod 61 which can actuate the sensitive seat 14 . For example, the sensitive seat 14 may have a pair of arms 62 extending from the body, the push rod 61 being received between the pair of arms 62 . The movement of the core wire 28 toward the angle adjustment disc 13 can shorten the effective length of the core wire 28, so the second end 30 of the core wire 28 can drive the transmission pulley 19, so that the push rod 61 of the transmission pulley 19 can operate the sensitive seat 14. . Advantageously, the gearbox assembly 9 may further include a return spring 24 configured to tension the core wire 28 in a direction away from the cam plate 31 .

When the adjusting bolt 32 is used to adjust the angular position of the vehicle sensing device 10 , the movement of the core wire 28 drives the transmission pulley 19 to rotate through the second end 30 , which in turn drives the vehicle sensing device 10 to rotate to adjust the angular position of the vehicle sensing device 10 .

In some embodiments, the core wire drive may further include a calibration indicator structure, which may include a first calibration indicator associated with movement of the core wire 28 and a stationary second calibration indicator. For example, as shown in FIG. 9 , the first calibration indication mark may be provided on the transmission pulley 19, and the first calibration indication mark may be the first calibration indication hole 19-1. It should be understood that the first calibration indicator can also be provided on other components, for example, on the vehicle sensing device 10 . For example, as shown in FIG. 9 , the second alignment indicator can be provided on the first housing part 20, and the second alignment indicator can be the second alignment indicator hole 20-2. It should be understood that the second calibration indicator may also be provided on other components, for example on the second housing part 16 . The first calibration indicator and the second calibration indicator are configured such that when the first calibration indicator is moved by the core wire 28 into mutual alignment with the second calibration indicator, it indicates that the core wire is tightened and the vehicle sensing device 10 has reached the passageway. Calibrated angular position.

In the embodiment shown in the figures, the transmission mechanism is designed in the form of a transmission pulley 19 . It should be understood that in other embodiments, the transmission mechanism may also be in other suitable forms. For example, the transmission mechanism may include a rack and a gear, wherein the screwing process of the adjusting bolt 32 drives the rack to move a certain distance in a straight line, thereby driving the gear to rotate a certain angle around its own rotation axis. The gear may be configured with an integrated pushrod, and the pushrod may be configured to directly drive the feel device 10 .

Another aspect of the present disclosure relates to a seat belt retractor comprising a retractor body 1 configured for mounting to a backrest 4 of a vehicle seat, integrated in the retractor body 1 The rotatable vehicle sensing device 10 and the above-mentioned core wire transmission device, the vehicle sensing device 10 is drivingly connected with the core wire transmission device.

Another aspect of the present disclosure relates to a method for calibrating the vehicle sensing device 10 of a seat belt retractor, as shown in FIG. 3 and FIGS. 5A to 5C , the method may include the following method steps: The first end section 28-1 is inserted into the core wire channel 58-1, and the second end section 28-2 of the core wire 28 is drivingly connected to the vehicle feel device 10; the adjusting bolt 10 is screwed into the bolt hole 58-2 to drive the actuating element at the first end section 28-1 and thus the core wire 28 until the first alignment indicator and the second alignment indicator are aligned with each other.

The bolt holes 58 - 2 of the core wire transmission device for the seat belt retractor according to the embodiment of the present invention can be directly arranged on the angle adjustment plate 31 without additionally providing a slider or other threaded fittings, so that it can be A low number of parts and a compact structural arrangement are achieved. By pushing the first end 29 of the core wire 28 through the adjusting bolt 32 completely through the bolt hole 58 - 2 , the adjustment of the core wire 28 and thus the vehicle feeling device 10 can be realized, and this can achieve better adjustment of the adjusting bolt 32 's strength. Compared with pulling the threaded fitting by adjusting the bolt 32 as in the prior art, the risk of thread end wear can be reduced, and the length of the threaded fitting portion of the adjusting bolt 32 is constant, so that the tightening force of the bolt is relatively stable.

Although exemplary embodiments of the present disclosure have been described, it will be understood by those skilled in the art that various changes and modifications can be made in the exemplary embodiments of the present disclosure without materially departing from the spirit and scope of the present disclosure. Accordingly, all changes and modifications are included within the scope of protection of the present disclosure as defined by the claims. The disclosure is defined by the appended claims, with equivalents of the claims to be included.

Claims (15)

A core wire transmission device for a seat belt retractor, characterized in that the core wire transmission device comprises: a core wire having a first end section and a second end section, the first end section having an actuating element, the second end section being configured for reeling with a seat belt The drive connection of the rotatable car-sensing device of the receiver; A first pulley comprising a core wire mounting portion having a core wire channel for receiving and guiding a first end section of the core wire and a core wire channel arranged side by side with the core wire channel a bolt hole, the core wire can be wound and unwound on the first pulley, the core wire transmission device includes an adjustment bolt received in the bolt hole, the screwing of the adjustment bolt in the bolt hole can be In the first end section, the actuating element is driven in a direction facing away from the core wire and thus drives the core wire in a movement relative to the first pulley. The core wire transmission device for a seat belt retractor according to claim 1, wherein the core wire mounting portion is configured as a boss on the edge of the first pulley. The core wire transmission device for a seat belt retractor according to claim 1 or 2, wherein the core wire channel extends in the circumferential or tangential direction of the first pulley, and the bolt hole is in the first pulley. A pulley extends tangentially upwards. The core wire transmission device for a seat belt retractor according to claim 1 or 2, wherein the bolt hole is located radially outside the core wire channel. The core wire transmission device for a seat belt retractor according to claim 1 or 2, wherein the bolt hole is located on the axial side of the core wire channel. Wire drive for a seat belt retractor according to claim 1 or 2, characterized in that the actuating element is configured as a first end at the end of a first end section of the wire and the first end at least partially covers the bolt hole. The core wire transmission device for a seat belt retractor according to claim 6, wherein the core wire mounting portion has an elongated mounting seat corresponding to the outer contour shape of the first end of the core wire , to accommodate and guide the first end. The core wire transmission device for a seat belt retractor according to claim 6, wherein the first end of the core wire has a figure-eight, circular, rectangular or oval outer contour. The core wire transmission device for a seat belt retractor according to claim 1 or 2, characterized in that the second end section is drivingly connected to the vehicle sensing device via a transmission mechanism. The core wire transmission device for a seat belt retractor according to claim 9, characterized in that the second end section is drivingly connected to the vehicle sensing device via a second pulley, wherein the second end The second end of the section is fixed in the second pulley, and the second end section can be wound and unwound on the second pulley, which is drivingly connected to the vehicle feel device. The core wire transmission device for a seat belt retractor according to claim 1 or 2, wherein the core wire transmission device comprises a return spring configured to be in a direction away from the first pulley Tension the core wire. The core wire transmission device for a seat belt retractor according to claim 1 or 2, wherein the core wire transmission device further comprises a calibration indication structure including a first calibration indication associated with the movement of the core wire mark and a stationary second calibration indicator, the first and second calibration indicators being configured such that when the first and second calibration indicators are aligned with each other, the adjustment bolt is adjusted to the target position and the vehicle sensor to reach the calibrated angular position. The core wire transmission device for a seat belt retractor according to claim 1 or 2, wherein the first pulley is an angle adjustment plate of an angle adjustment plate assembly, and the angle adjustment plate assembly further comprises an adjustment plate. The angle housing has a core wire lead-in and is configured to be fixedly connected coaxially with a pivot axis of the backrest of the vehicle seat, wherein the angle adjustment housing is positioned at a position relative to the angle adjustment disc. When rotating in the first rotating direction, the core wire can be wound on the angle adjustment disk, wherein the first rotating direction corresponds to the direction of adjusting the backrest angle. A seat belt retractor comprising a retractor body configured for mounting to a backrest of a vehicle seat, a rotatable vehicle feel integrated in the retractor body A device and a cord drive for a seat belt retractor according to any one of claims 1 to 13. A method for calibrating a vehicle feel device of a seat belt retractor, the seat belt retractor comprising a retractor body configured for mounting to a backrest of a vehicle seat, a retractor body integrated in the retractor body The rotatable vehicle sensing device and the core wire transmission device for a seat belt retractor according to any one of claims 1 to 13, the method comprising the following method steps: Inserting the first end section of the core wire into the core wire channel, and drivingly connecting the second end section of the core wire with the vehicle sensing device; The adjustment bolt is screwed into the bolt hole to actuate the actuating element and thus the core wire until the first alignment indicator and the second alignment indicator are aligned with each other.

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